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CH701 Warpdrive

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graeme(at)coletoolcentre.
Guest

Posted: Tue Mar 18, 2008 6:44 pm Post subject: CH701 Warpdrive

Hi 



Is any one flying a CH701 with warpdrive Prop.



I have Rotax 912extra (90-95hp) 

69 inch three blade warp drive



What starting pitch?

Torque for 1/4" blade pinch bolts?

Torque for 8 mm prop to hub bolts?



Thanks in advance



Graemecns



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kmccune

Joined: 22 Sep 2007
Posts: 577
Location: Wisconsin, USA

Posted: Wed Mar 19, 2008 3:00 am Post subject: Re: CH701 Warpdrive

http://www.warpdriveprops.com/



Give them a call, others may be able to help with the starting point for the pitch, but you really should get torque specs from the factory.



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_________________
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"Real freedom is the sustained act of being an individual." WW - 2009

"Life is a good deal...it's worth it" Feb 1969
Dorothy McCune

klr12(at)psu.edu
Guest

Posted: Wed Mar 19, 2008 4:11 am Post subject: CH701 Warpdrive

This was taken right from the Warp Drive web page

 

 

 

 [quote]   

Propeller Torque Values   

Propeller Bolt Torque Values--All Standard, HP and HPL hubs that use 1/4" bolts to clamp the blades in the hub should be tightened to 120 inch pounds.   All Rotax bolt patterns that use 8 mm bolts to clamp the blades in the hub should be tightened to 175 inch pounds.  All Standard, HP and HPL hubs that use 3/8" bolts to clamp the blades or mount the prop should be tightened to 35 foot pounds.   Warp Drive propeller installations on direct-drive aircraft engines and other engines used on airboats must tighten the 5/16" clamping bolts to 200 inch pounds and tighten the 1/2" flange mounting bolts to 60 foot pounds.   Torque 8mm bolts which attach the propeller hub to the engine flange to 175 inch pounds.  Adherence to these torque values is imperative for reasons of safety. [b]

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graeme(at)coletoolcentre.
Guest

Posted: Wed Mar 19, 2008 2:52 pm Post subject: CH701 Warpdrive

Thanks for the values I have read more closly and  am ok with torque for my prop now.

 I am going to try 17 derees to start and check it  static and adjust

  

 Graemecns

  

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kissell

Joined: 05 Dec 2006
Posts: 18
Location: Beavercreek, Ohio

Posted: Wed Mar 19, 2008 4:35 pm Post subject: CH701 Warpdrive

Graemecns,

  

 I fly a 701 with the 100 hp Rotax and have found  that 11 to 12 degree is about right. With 12 degree you will just go to 5800 in  full power cruise and to only about 5400 in a 60 mph climb. I think you  will find that 17 will be far to much.

  

 Bob Kissell N701UB with 47 hour.

  

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graeme(at)coletoolcentre.
Guest

Posted: Wed Mar 19, 2008 6:41 pm Post subject: CH701 Warpdrive

thanks 

  

 I will start at 12

  

 Graemecns

  

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lgold(at)quantum-associat
Guest

Posted: Thu Mar 20, 2008 6:14 pm Post subject: CH701 Warpdrive

I have a 3-blade Warpdrive on my 701 with a 100HP Rotax  and found 11.2 better than 12-degrees. 12 would only give a maximum static  RPM of about 5100. 



 [quote]         From: owner-zenith-list-server(at)matronics.com    [mailto:owner-zenith-list-server(at)matronics.com] On Behalf Of    Graeme

Sent: Wednesday, March 19, 2008 7:32 PM

To:    zenith-list(at)matronics.com

Subject: Re: Re: CH701    Warpdrive

   

   thanks 

    

   I will start at 12

    

   Graemecns

    

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graeme(at)coletoolcentre.
Guest

Posted: Mon Mar 24, 2008 2:56 am Post subject: CH701 Warpdrive

I have test run the 912 extra at 12.5  degrees I got 4800 rpm static.

 I intend to change to 11 when I get som  propper aircraft Quailty nuloc nuts as some of the bolt shop ones won't do 120in  lbs

 before Stripping.

 I may have to go less pitch as I only expect  90-95hp from the motor.

 Will check next weekend after ground run  again.

  

 GraemeCNS  

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